Electric trip mechanism.



no K DBL.

PATENTED AUG. I8, 1903.

. C. C(ELYIz-A. KOBELT.

ELECTRIC TRIP MECHANISM.

urmonmn nun 0019. 1902.

Patented August 18, 1903.

CHARLES C. ELY AND ADOLPH KOBELT, OF KANSAS CITY, MISSOURI.

ELECTRIC TRIP MECHANISM.

SPECIFICATION forming part of Letters Patent No. 736,511, dated August18, 1903. Application filed October 9, 1902. $eria1 No. 126,422. (Nomodel.)

To a. whom it natty concern:

Be it known thatwe, CHARLES C. ELY and ADOLPH KOBELT, citizens of theUnited States, residing at Kansas City, in the county of Jackson, Stateof Missouri, have invented certain new and useful Improvements inElectric Trip Mechanism; and we do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to electric trip mechanisms; and it has for itsobjectaconstruction wherein upon closing an electric circuit a weightwill be dropped which in its fall may be made to operate a valve oractuate any other mechanism to start or stop an apparatus, or for anyother purpose, it being understood that the invention in question may beemployed for whatever purpose it is applicable to.

A further object of the invention is to provide a construction whereinafter the weight is dropped the actuating-current will be shut off bybreaking its circuit, this being accomplished automatically.

Other objects and advantages of the invention will be understood fromthe following description:

In the drawings forming portion of this specification, and in which likenumerals of reference indicate similar parts in the several views,Figure l is an elevation showing the mechanism connected with a valvefor operating the latter when the weight is dropped. Fig. 2 is averticalsection through the mech anism, parts thereof being in elevation. Fig. 3is a section through the frame of the solenoid in a plane above thelatter and showing the solenoid and other parts in plan.

Referring now to the drawings, there is shown a loop-shaped frame 5, thesides of the upper portion of which are parallel and spaced sufficientlyfar to, receive therebetween a solenoid 6, the sides of this frame belowthe solenoid being converged and then continued parallel and slightlyspaced. Within the solenoid is a slidable soft-iron core 8, which whenthe solenoidis energized is lifted into the solenoid and when thesolenoid is denergized drops partly therefrom, the downward movement ofthe core being arrested by contact of a terminal screw 8' with theconvergentportions of the sides of the frame 5. When the solenoid isenergized, the the core projects from the upper end thereof.

In connection with the frame 5 and other parts above described areemployed two spring-arms 15, having cars 15, which are pivoted betweenthe lower end portions 30 of the frame 5, so that the arms projectlaterally and upwardly from the frame and also downwardly from theframe, these downwardly-db rected portions being curved in oppositedirections in the form of hooks 7, which lie in a common plane andare sodisposed that when the upper ends of the arms are moved outwardly orseparated the free ends or the tips of the bills of the hooks move intocontact. These books form clutching-jaws for engagement with the ring 19of a weight 18, so that when the jaws are in positions shown in Figs. 1and 2 they will support the weight. The hooks or clutching jaws Tareheld in active positions by means of a toggle-lever comprising links 16and 17, which are pivoted together at their inner ends and overlapslightly, as shown in Figs. 2 and 3, the outer ends of the links beingpivoted, respectively, to the upper ends of the arms 15, so that saidlever lies with the pivot, which connects the links directly over and inthe path of movement of the solenoid-core 8. When the toggle-links aremoved to the positions shown in Figs. 1 and 2, the clutching-jaws areactive and the arms 15 are under tension, and when the solenoid isenergized and when the core is raised it strikes the mutually-connectedends of the toggle-links and starts them upwardlyand raises them untilthe jaws are separated to drop the weight. To returnthe toggle-links tothe positions shown in Fig. 2, a rod 13 is provided, which is passedslidably through perforations in the end pieces or spool of thesolenoid, the upper end of this rod being turned laterally andterminating in an eye 12, which slidably engages the rod 11, connectedto the frame 5 and to the end of the solenoid-spool. Thislaterally-turned upper end portion of the rod 13 extends transversely ofthe toggle-links above and near to the connecting-pivot thereof, andwhen the inner ends of the links are moved upwardly by the solenoid-corethe rod is lifted. To

return the links then, it is necessary only to draw the rod downwardly.

It is desirable to break the energizing-circuit of the solenoid as soonas the weight has been dropped, and for this purpose two electricalcontacts 26 and 27 are mounted upon the end of the solenoid-spool insuch position that when the toggle-links are set, as illustrated in Fig.2, the link 17 will bridge the contacts and close the circuittherebetween. The contact 26 is connected with one end of thesolenoid-winding, while the other contact, 27, has a binding-screw 28for connection of a line-wire, the second terminal or end of thesolenoid winding being connected with a binding-screw 25 for attachmentof a second line-Wire. When the toggle-links are moved upwardly by theaction otlthe solenoid-core, the link 17 moves out of engagement withthe contacts 26 and 27 and the circuit is broken. The Weightin itstendency to move from the clutching-jaws forces the jaws apart and theupper ends of the arms toward each other, so

that the link 17 is carried positively from engagement with the contact.The weight is shown as connected by means of a cord 30 with a cut-offvalve 31, the weight passing over a pulley 32, so' that when the weightis dropped the valve will be operated.

What is claimed is- 1. A device of the class described comprising asolenoid having a reciprocatory core, cooperating clutch-jaws, and meansfor bolding the clutch-jaws in operative position, said holding meanslying in the path of movement of the core for engagement and move.- mentthereby into inoperative position.

2. A device of the class described com prising a solenoid having areciprocatory core, a toggle-lever disposed for movement. of its linksto break the lever by engagement therewith of the core when the solenoidis energized, a weight-clutch operatively connected with thetoggle-lever, and electrical contacts in spaced relation and disposedfor simultaneous contact by a toggle-link when the toggle-lever is inposition for engagement by v the core, said contacts being included inthe circuit of the solenoid.

3. A device of the class described comprising a solenoid having areciprocatory core, a circuit-breaker for the solenoid disposed foractuation by the core when the solenoid is energized, and a clutchmechanism disposed for actuation by the core prior to breaking of thesolenoid-circuit.

4:. A device of the class described comprising a solenoid having areciprocatory core, pivoted arms having clutching-jaws to reoeive andhold a weight, and a toggle-lever having its links pivoted respectivelyto the arms and adapted to hold the arms with their jaws in engagingpositions, said links lying in the path of movement of the core forengagement thereby to release the arms and their jaws.

5. A device of the class described comprising a solenoid having areciprocatory core, pivoted arms having clutching-jaws to rereceive andhold a weight, a toggle-lever having its links pivoted respectively tothe arms and adapted to hold the arms with their jaws in engagingpositions, said links lying in the path of movement of the core forengagement thereby to release the arms and their jaws, and means forreturning the links to their normal positions. v

6. A device of the class described comprising a solenoid having areciprocatory core, pivoted arms having cooperating clutching jaws atone end, a toggle-lever having its links pivoted to the opposite ends ofthe arms and lying in the path of movement of the core, for actuationthereby to move the arms and separate their jaws and means for returningthe toggle-lever to its normal position.

In testimony whereof we affix our signatures in presence of twowitnesses.

CHARLES C. ELY. ADOLPH KOBELT.

Witnesses:

CALVIN J. FAIRCHILD, JOHN Y. KELMAN.

